Enhanced oils and organic solvents absorption by polyurethane foams composites modified with MnO 2 nanowires

Zhang, Tao; Kong, Liying; Dai, Yutang; Yue, Xuejie; Rong, Jian; Qiu, Fengxian; Pan, Jianming

doi:10.1016/j.cej.2016.08.085

Cited by 201 publications

(68 citation statements)

References 43 publications

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“…In addition, it was observed that the saturated sorption capacity increased remarkably from PP1 to PP4, indicating that a higher expansion ratio and a higher void fraction are favorable for a higher sorption capacity. This is consistent with the previous report in which the sorption capacity of PU foams increases with the increase of the MnO 2 content from 0.1 to 0.4 wt%, which is attributed to the increased expansion of the foams. The saturated capacity for the PP1 to PP4 foams as a function of the foam density is shown in Figure B.…”

Section: Resultssupporting

confidence: 94%

“…Fourth, the saturated sorption capacities by volume and weight of the PP4 foams for the testing oils and solvents were investigated to further study how the intrinsic properties of the oils affect the sorption capacities. The saturated sorption capacities by volume and weight were obtained based on Equations 3 and , respectively.

Sorption capacity ((), mL / mL) = \frac{m_{s} - m_{0}}{ρ_{normals}} / \frac{ϕ m_{0}}{ρ_{0}}

where m 0 is the weight of the original dry PP4 foam sample, m s is the weight of the PP4 foam sample after saturated sorption of the testing oil, ρ s is the density of the testing oil, ρ 0 is the density of the original dry PP4 foam, and ϕ is the void fraction in the original foam.…”

Section: Methodsmentioning

confidence: 99%

“…Generally, oil sorbents can be classified into natural sorbents and synthetic sorbents . The former include zeolites, vegetable fibers, corn stalks, etc .…”

Section: Introductionmentioning

confidence: 99%

“…However, natural sorbents usually show a low sorption capacity and poor recyclability, and these drawbacks make natural sorbents less applicable, and thus, they are gradually being replaced by synthetic sorbents. Polyurethane (PU) foams and polypropylene (PP) fabrics are the most commonly used synthetic sorbents . PU foams exhibit large sorption capacities and rates; however, they also show poor selectivity for oil and water.…”

Section: Introductionmentioning

confidence: 99%

“…PU foams exhibit large sorption capacities and rates; however, they also show poor selectivity for oil and water. Thus, modification of PU foams is generally needed to increase their hydrophobicity to preferentially adsorb oil over water . PP fabrics are easy to fabricate and show good hydrophobic properties and high sorption rates; however, they have low sorption capacities, which is a drawback for their application as oil sorbents .…”

Section: Introductionmentioning

confidence: 99%

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Kinetics study of oil sorption with open‐cell polypropylene/polyolefin elastomer blend foams prepared via continuous extrusion foaming

Pang

Wang

et al. 2018

Polymers for Advanced Techs

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The objective of the present work was to study the sorption kinetics of open‐cell polypropylene/polyolefin elastomer (PP/POE) blend foams. First, open‐cell PP/POE foams of different cell structures were prepared by controlling the foaming temperature via a continuous extrusion foaming process. Second, the effect of the cell structures on the sorption process, rate, and capacity was studied. Pseudo‐first order and pseudo‐second order models were applied to study the sorption kinetics of the PP/POE foams for cyclohexane. Third, the sorption rate and sorption capacity by both volume and weight of the PP/POE foam for different oils and solvents were studied to show how the intrinsic properties of the testing oils and solvents affected the sorption performance. The results showed that the sorption with the PP/POE foams followed the pseudo‐second order kinetics model. Both the cell structures of the foams and the intrinsic properties of the testing oils and solvents affected the sorption performance. For the same testing oil, a higher open‐cell content in the foam was favorable for a higher sorption rate, and a higher void fraction was favorable for a higher sorption capacity. For the same foam, a lower viscosity of the testing oil was favorable for a higher sorption rate. The sorption capacity by volume was closely related to the viscosity of the testing oil, while both the viscosity and the density of the testing oil determined the sorption capacity by weight.

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Section: Resultssupporting

confidence: 94%

Sorption capacity ((), mL / mL) = \frac{m_{s} - m_{0}}{ρ_{normals}} / \frac{ϕ m_{0}}{ρ_{0}}

Section: Methodsmentioning

confidence: 99%

“…Generally, oil sorbents can be classified into natural sorbents and synthetic sorbents . The former include zeolites, vegetable fibers, corn stalks, etc .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Kinetics study of oil sorption with open‐cell polypropylene/polyolefin elastomer blend foams prepared via continuous extrusion foaming

Pang

Wang

et al. 2018

Polymers for Advanced Techs

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Biobased Aerogels for Oil Spill Remediation

Leng

Zhang

et al. 2021

Supramolecular Gels

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A Bioinspired Photothermal Pneumatic Device Enabling Optical Manipulation of Microfluid toward Precise Control of Microreactions

Wang

2019

Adv Eng Mater

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Various driving methods are developed in microfluidic technology to manipulate small amounts of liquid. Among them, the photocontrol method is highlighted for its advantages in contactless and accuracy control. However, the illumination method may induce risks of radiation damage, thermal damage, or chemical environment changes. To avoid these risks, a photothermal pneumatic microfluidic device (PPMD) containing a photothermal composite, an air chamber, and a tube is designed, bioinspired by the feeding process of female mosquitos. One way to drive liquid columns at a constant velocity higher than 1.0 cm s−1 in microtubes without interface modification is successfully obtained, and a method to separate out water–oil two‐phase liquid mixtures is proposed. The integration of several single PPMDs enables complex logical operations (AND and OR) toward precise control of microreactions. This work is promising in fields of microfluidic chips, pneumatic devices, liquid transfer, microreactions, and water–oil phase separation.

show abstract

Enhanced oils and organic solvents absorption by polyurethane foams composites modified with MnO 2 nanowires

Cited by 201 publications

References 43 publications

Kinetics study of oil sorption with open‐cell polypropylene/polyolefin elastomer blend foams prepared via continuous extrusion foaming

Kinetics study of oil sorption with open‐cell polypropylene/polyolefin elastomer blend foams prepared via continuous extrusion foaming

Biobased Aerogels for Oil Spill Remediation

A Bioinspired Photothermal Pneumatic Device Enabling Optical Manipulation of Microfluid toward Precise Control of Microreactions

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